1. (n.) One who is discontented or dissatisfied with the current conditions\; especially, dissatisfied with the government.

2. (n.) One who discontented; especially, a discontented subject of a government; one who express his discontent by words or overt acts.

agitator alienated anarch anarchist beefing bellyacher bellyaching bitching brawler complainant complainer complaining complaintful contumacious crab crabbing crabby crank cranky croaker croaking disaffected disappointed discontent discontented disgruntled disobedient displeased dissatisfied envious estranged extremist factious faultfinder faultfinding frondeur griever griper griping grouch grouchy grouser grousing growler growling grumbler grumbling insubordinate insurgent insurrectionary insurrectionist insurrecto kicker killjoy kvetch lamenter malcontented maverick mourner murmurer murmuring mutineer mutterer muttering nonconformist out of humor peevish petulant querulant querulous querulous person reactionary reactionist rebel rebellious resentful restive restless revolter revolutionary revolutionist rioter seditious sorehead sourpuss spoilsport subversive sulky traitor unaccepting unaccommodating uneasy unfulfilled ungovernable ungratified unhappy unruly unsatisfied wet blanket whiner whiny